I hate to break the streak in this thread, but yes, I have had problems.
My original transmission started doing some grinding, a visit to the dealer fixed the problem although they said they couldn't find a problem at all. Somehow their diagnostic procedure fixed the issue, or else they fixed it and lied about it?
Then the transmission started popping out of third. Dealer replaced the transmission, and I immediately noticed a grinding issue going from third to second. Dealer told me it would be fine, just needed to wear in, drive it a couple thousand miles and then come in for a checkup. Well, it got worse, not better, including refusing to go into reverse without work.
Then my clutch burned out. Replacing the clutch did not fix the transmission problem. Dealer rode around in the car and told me there's nothing wrong, that it's just expected that I'd have some grinding in an econobox... which I would find hard to believe, but acceptable, if it wasn't for the fact that the original transmission did NOT have this problem! (it had other problems, but not this one)
I love my Sonic, I push it hard, I have modified it up one end and down the other. The clutch that blew out was an aftermarket one, I can't complain about the OEM clutch... but I think the OEM replacement transmission burned it up. And I see the same transmission complaints on Sonics that have not been modified, have not been pushed hard. I think there's a problem, and I think my dealership isn't doing a good job of handling the issue.
If they said "it's not bad, it was caused by your modifications, so we recommend you don't bother fixing it", then I would probably just shut up and soldier... but the idea that this problem somehow doesn't exist (that is, yes, they see it, but they aren't interested in fixing it) is just plain crazy.
That said, that seems to be a dealership problem, not a Chevy problem per se.
